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This study was laid out during the years of 2015–2016 and 2016–2017 at the village Niyamatpur Thakuran, Farrukhabad, India. The soil of the experiment site was sandy loam which is conducive for cane cultivation. The six treatment combinations, i.e. ratoon cane alone, cane ratoon + vegetable pea, cane ratoon + cauliflower, cane ratoon + cabbage, cane ratoon + radish and cane ratoon + onion, were tested on farmers' fields. Sugarcane planted in the spring season was harvested from the end of October to mid-November for juice and other purposes, and autumn ratoon was allowed. The row-to-row distance of cane ratoon was 90 cm; therefore, two rows of cauliflower and cabbage, three rows of radish and vegetable pea and four rows of onion were planted between two rows of autumn cane ratoon for fetching market value. The companion crops gave additional yield to the extent of 221 q/ha cauliflower, 319 q/ha cabbage, 224 q/ha radish, 118 q/ha green pods of vegetable pea and 298 q/ha bulbs of onion without any adverse effect on autumn ratoon. The highest stalk yield was weighed by 641 q/ha under companion cropping of cane ratoon + vegetable pea followed by cane ratoon + onion (639 q/ha). The lowest yield of cane ratoon was noticed in cane ratoon alone by 561 q/ha in comparison with all other companion cropping systems. The highest net return was computed under cane ratoon + onion cropping system (Rs. 38,794/ha) followed by cane ratoon + radish (Rs. 324,869/ha) and cane ratoon + vegetable pea for green pods (Rs. 32,236/ha). The similar trend was noted under benefit–cost ratio. [ABSTRACT FROM AUTHOR]

Despite many losses, nitrogen may remain in the soil for more than one cycle. It can benefit the culture of sugarcane due to its longevity. The objectives of this study were to evaluate the yield of stalks and the recovery of residual N from urea applied to sugarcane (plant-cane cycle), which could be used by sugarcane ratoon subjected to different levels of water replacement and residual nitrogen doses. The experiment was conducted at an experimental area belonging to the Federal Institute Goiano, campus Rio Verde, Brazil, using plastic pots containing dystrophic Red Latosol from Cerrado and cattle manure. The experimental design was completely randomized with three replications analyzed in 3 × 3 split plots. The treatments consisted of three levels of water replacement (75, 50 and 25% of field capacity) and three residual N doses (60, 120 and 180 kg ha−1) in the form of urea enriched with 15N applied to plant-cane in a preceding cycle. Residual N doses influenced the stalk yield. The highest stalk yields was achieved by high water replacements. The nitrogen recovery was high in the residual N dose of 60 kg ha−1 initially applied to plant-cane when associated with water replacement at 75%. Regardless of the N dose applied, the use of residual N was less than 7.06% of the amount originally applied to plant-cane. [ABSTRACT FROM AUTHOR]

The sweet sorghum variety, ICSV 93046 is commercially cultivated in large areas in India and the Philippines. The response of ICSV 93046 to six fertilizer treatments viz., T1 (control: 80 kg N ha and 40 kg PO ha); T2 (designed fertilizer from a commercial source); T3 (N + P with Zn and B soil application); T4 (N + P with Zn and B soil application); T5 (N + P with foliar application of 0.1 % sodium borate and T6 (N + P with foliar application of 0.5 % ZnSO and 0.1 % sodium borate) was evaluated during the post-rainy season (December-March, 2009-2010) as main (plant) crop and during summer season (April-July, 2010) as ratoon crop. The combined ANOVA showed that there were no significant differences observed between main and ratoon crops and the treatment interactions for the qualitative and quantitative component traits of sugar yield measured and also no significant differences observed for main and ratoon crop except for non-significant numerical differences giving a trend. The stalk yield was highest for treatments T5 and T6 in main crop and in the ratoon crop however, the treatment T4 recorded the highest stalk yield. [ABSTRACT FROM AUTHOR]