Nutrient Management Strategies for Groundnut-blackgram Cropping Sequences

Aims: To refine nutrient management practices for the groundnut-blackgram cropping sequence, focusing on enhancing both yield and quality.Study Design: The experiment was conducted in a split-plot design with three replications.Place and Duration of Study: Regional Research Station in Vridhachalam during the Kharif and rabi season of 2016-17.Methodology: The experimental encompassed various nutrient levels applied to groundnut in the main plots: M1-Control, M2-100% RDF, M3-125% RDF, and M4-150% RDF. Additionally, different nutrient levels were applied to the blackgram subplot: S1-Control, S2-50% RDF, S3-75% RDF, and S4-100% RDF.Results: Analysis of the results indicated that use of 125% RDF in groundnut significantly provide higher pod yield (2657 kg/ha). However, the control group recorded a significantly lower pod yield. Subsequent blackgram seed yield was notably influenced by inorganic fertilizers applied to the preceding groundnut crop. In blackgram, the application of 75% RDF resulted in a higher number of pods per plant (34.6), No. of branches/plant (7.8) and seed yield (823 kg/ha). This performance was comparable to the application of 100% RDFConclusion: These findings underscore the importance of optimizing nutrient management practices, particularly the combination of 125% RDF for groundnut, to enhance pod yield, while the application of 75% RDF demonstrated positive effects on subsequent blackgram seed yield.

Enhancing Rainfed Castor Growth, Seed, and Oil Yield Via Nano Urea Application

Aims: Conventional urea fertilizer has been critical in enhancing castor yields. However, nano urea, a game-changing technology in modern agriculture, provides a significant advancement in terms of sustainable and efficient crop production.Study Design: The experiment was conducted in a Randomized block design (RBD) with eight treatments and three replications.Place and Duration of Study: Tapioca and Castor Research Station in Yethapur during the Kharif season of 2022.Methodology: The major objective is to increase hybrid castor growth and production under rainfed circumstances by foliar application of nano urea. The castor hybrid YRCH 1 with an RDF of 60:30:30 NPK kg ha-1 was chosen for the study. The experimental details viz; T1 - 100% N through Urea –RDF, T2 - 50 % of recommended basal N + Nano urea foliar spray @ 2 ml/l at 30 and 60 DAS, T3 - 50 % of recommended basal N + 2 % Urea foliar spray at 30 and 60 DAS, T4 - 75 % of recommended basal N + Nano urea foliar spray @ 2 ml/l at 30 and 60 DAS, T5 - 75 % of recommended basal N+ 2 % Urea foliar spray at 30 and 60 DAS, T6 - 100 % of recommended basal N + Nano urea foliar spray @ 2 ml/l at 30 and 60 DAS, T7 - 100 % of recommended basal N + 2 % Urea foliar spray at 30 and 60 DAS.Results: According to the findings of the study, applying 100% of the recommended basal N + Nano urea foliar spray @ 2 ml/l at 30 and 60 DAS is advantageous to the crop and improves the growth and yield characteristics of hybrid castor under rainfed conditions. However, when compared to other treatments, foliar application of nano urea with 50% indicated basal N resulted in significantly lower growth and yield.Conclusion: The major objective is to increase hybrid castor growth and production under rainfed circumstances by foliar application of nano urea

Source-Sink Alterations in Rice Fallow Adaptive Blackgram Variety ADT3 for Enhancement of Yield and Quality of Seed

Seed Production of rice fallow blackgram variety, ADT3 has limitations due to inherent issues of soil fertility, climate change and thermo sensitivity results in poor flowering, reduced pod setting and poor seed filling. Macro and micro nutrients application during critical stages of growth were tried to improve the seed yield and quality in rice fallow blackgram variety ADT3. The combined foliar spraying of 0.5% NPK (macro) and 0.2% chelated micro nutrients mixture (Fe 2.5%, Mn 1.0%, Zn 3.0%, Cu 1.0%, Mo 0.1% and B 0.5%), were sprayed on 15th (Vegetative phase), 30th (Reproductive phase), 45th ( Flowering and pod formation phase) days after germination improved the growth and seed parameters viz., plant height, number of branches, number of pods per plant, number of seeds per pod, filled seed % which resulted in increased seed yield in rice fallow blackgram variety, ADT3.Response of macro and micro nutrients through foliar mode revealed the lack of soil fertility resulting in poor uptake of macro and micro nutrients. Foliar application induced uniform flowering and synchronous maturity of pods with least shattering which would facilitate mechanical harvesting. Foliar application of macro and micro nutrients phenotypically altered the source-sink which greatly influenced the yield of seed, germination and seedling quality parameters