1、Full article: Absorption of foliar

The objectives of this study were to evaluate the utilization efficiency of foliar-applied urea and the effect on N, K, Mg and S nutritional status of tea plants.

2、Foliar urea fertilization of cereals: A review

When damage has not been severe, foliar urea applications have increased grain yield, particularly when applied before flag leaf emergence and when nitrogen availability is limiting.

3、Effect of Foliar Applied Urea on Growth and Yield of Sunflower (Helianthus annuus L.)

60 days after sowing and T5 = 1% urea at 85 days after sowing. The results re-vealed that growth and yield characters as well as oil yield of sunflower were significantly (P < 0.05) affected by foliar application of urea.

4、Effect of foliar application of urea on the growth and yield of tomato

Results showed that different yield components and yield of tomato were influenced by the foliar application of different concentrations of urea.

5、RESPONSE OF MAIZE TO FOLIAR VS. SOIL APPLICATION OF NITROGEN–PHOSPHORUS–POTASSIUM FERTILIZERS

The effectiveness of FF appeared to be limited by the holding capacity of leaf surface area for the liquid fertilizer. It was concluded that FF may partially compensate for insufficient uptake by the roots, but requires sufficient leaf area to become effective.

Effect of humic acid and fulvic acid based liquid and foliar fertilizers on the yield of wheat crop

The purpose of this study was to develop an efficient and cost effective liquid and foliar fertilizer and compare their potential with commercially available urea and DAP.

Nano Nutrient Foliar Application: Impacts on Yield, Quality, and Nutrient Efficiency in Dryland Finger Millet

It comprises 12 treatments with different levels of nitrogen in combination with foliar application of nano nutrients at 35 and 55 DAS. Results Foliar application of nano-N and nano-Zn along with 100% RDN + recommended PK in finger millet significantly enhanced the growth, yield, and nutrient utilization efficiency of finger millet.

Impact of Nitrogen Fertilizer and Foliar Spray of Selenium on Growth, Yield and Chemical Constituents of Potato plants

Results showed that nitrogen application resulted in an increase in the vegetative growth, tuber yield and quality parameters as compared with the untreated plants. Data also demonstrated that selenium application promoted plant growth, tuber yield and quality over the control treatments.

Effect of N fertilizer and foliar

Therefore, the objective of this field experiment was to study the effect of N fertilizer applied to the soil at R4 and foliar spray, and the Fe fertilizer effects at the R1 and R3 stages on soybean grain yield and the quality.

A plan for efficient use of nitrogen fertilizers

A global analysis finds that nitrogen fertilizers could be used more efficiently if their international distribution across croplands was altered — a measure that would also decrease nitrogen...

The time it takes for foliar-applied liquid nitrogen fertilizer to show results depends on multiple factors, including the type of fertilizer, soil conditions, climate, and the plant’s growth stage. Below are detailed insights into the variables affecting its efficacy:

1. Fertilizer Type: Different nitrogen fertilizers vary in effectiveness and speed of action. For example, urea, a common liquid nitrogen source, contains high-concentration nitrogen and can be rapidly absorbed by plants. Urea typically takes effect within a few days after application, though exact timing may vary with soil and weather conditions.

2. Soil Conditions: Soil structure and fertility influence how quickly nitrogen is absorbed. Soils rich in organic matter and microbial activity may accelerate nitrogen uptake. Conversely, poor or compacted soils may slow down the fertilizer’s impact.

3. Climate: Environmental conditions play a critical role. In warm and humid climates, plants absorb nutrients faster, leading to quicker results. In cold or dry conditions, plant metabolism slows, delaying the fertilizer’s effects.

4. Plant Growth Stage: Nitrogen demands vary by developmental phase. During early growth, plants require more nitrogen to support root and leaf development, so fertilizers act faster. Late-stage plants may not respond as strongly if soil nitrogen levels are already sufficient.

5. Application Method: Proper spraying techniques and frequency improve absorption. Uniform application prevents localized oversaturation (which can harm roots), while excessive frequency risks nutrient loss.

6. Dosage: The amount of fertilizer applied directly impacts timing. Optimal dosages meet plant needs without causing rapid, unhealthy growth. Overapplication can waste resources and harm plants.

The effectiveness of foliar nitrogen fertilizers varies based on these factors. For best results, select appropriate fertilizer types, tailor application methods to specific conditions, and monitor plants and soil regularly. Adjust strategies as needed to ensure efficient nutrient use and healthy plant growth.

This translation maintains technical accuracy while ensuring clarity and readability in English. Key terms like "foliar application," "microbial activity," and "nitrogen uptake" align with agricultural terminology.