Periodic P fertilizer application is recommended for small-holder farmers in Northeast China: evidence from a 12-year study

2015 ◽  
Vol 103 (2) ◽  
pp. 241-253
Author(s):  
Yongzhuang Wang ◽  
Xin Chen ◽  
Joann K. Whalen ◽  
Muqiu Zhao ◽  
Caiyan Lu ◽  
...  
Author(s):  
Jim J. Miller ◽  
Mallory Owen ◽  
Ben Ellert ◽  
Xueming Yang ◽  
Craig F. Drury ◽  
...  

Soil water repellency (SWR) was measured for a 28 yr field study under irrigation on a clay loam Dark Brown soil in southern Alberta. The objectives were to study the effect of legume-cereal crop rotations, feedlot manure, and phosphorus (P) fertilizer application on soil hydrophobicity (SH) and soil water repellency index (RI) under irrigation. Mean SH and RI were similar (P > 0.05) for a legume-cereal and cereal rotation, and were unaffected by P fertilization. However, P fertilization shifted the RI classification from slight to sub-critical. In contrast, SH was significantly greater for manured than non-manured treatments, while RI was unaffected. Soil organic carbon (SOC) concentration was significantly (P ≤ 0.05) correlated with SH (r=0.74), but not with RI (r=-0.17). This suggested a closer association between the quantity of SOC and quantity of hydrophobic compounds (SH method) compared to the hydrophobic coatings inhibiting infiltration of water (RI method). No significant correlation between SH and RI (r=-0.09) suggests that SH is not a good predictor of SWR using the RI method. Overall, manure application increased SH and P fertilization shifted the RI classification from slight to sub-critical. In contrast, legume-cereal rotations had no influence on SH and SWR using RI method compared to continuous cereal.


Author(s):  
Abel Kinyondo ◽  
Joseph Magashi

Poverty reduction has been a difficult milestone for Tanzania to achieve despite recording remarkable economic growth over the past decade. This is because the attained growth is not inclusive, in that sectors contributing to this growth employ fewer people. Given the fact that agriculture continues to employ the majority of people in Tanzania, efforts to improve livelihoods should necessarily be geared towards transforming the sector. It is in this context that using a sample of 3,000 farmers from 13 regions of Tanzania; this Tanzania, this study set out to examine challenges facing farmers and their respective solutions following the sustainable livelihood framework. Findings show that improving farmers’ livelihoods would entail concerted efforts by the government to avail to farmers, quality and affordable seeds, fertilizer, agricultural infrastructures, subsidies, extension services, markets, information alert, affordable loans, and areas for pastures. This implies that the government needs to allocate enough funds to the agricultural sector if farmers’ needs are to be met. We note, however, that government’s allocation to the sector has alarmingly generally been exhibiting a declining trend for the past four years. It is against this background that we strongly recommend that the government rethinks its position and prioritize the agricultural sector in its budget.


2021 ◽  
Vol 31 (1) ◽  
pp. 45-50
Author(s):  
A. T. Omokanye ◽  
J. T. Amodu ◽  
S. O. Onifade

Forage, seed yields and herbage chemical composition of phasey bean Macroptilium lathyroides) were investigated at 3 intra-row plant spacings (15, 30 and 45cm between plants; 50 cm between roms), 4 phosphorus (P) fertilizer application rates (O), 50, 100 and 750 kg/ha P) and 5 harvest stages (uncut control, 6, 9, 12 and 15 weeks post sowing) in two growing seasons at Shika in northern Nigeria. The least intra-row plant spacing (15cm) produced higher (p<0.01) total DM vield (1.50 t/ha) than wider spacings. The proportion of leaf was least (40 %) in the widest spacing compared with other spacings (59-62 %). The P-fertilized plots produced 58-60% more total DM vields than the unfertilized plots and total DM yields increased with advanced plant growth. The highest percentage (61-63) of leaf was recorded from 6 to 12 weeks post sowing. Nitrogen level in herbage increased (p<0.05) with increased intra-row plant spacing and P application. Phosphorus and Calcium. Levels in herbage did not respond to intra-row plant spacing but increased with P application. The Ca:P ratios at the harvest stages were between 1:1 and 6:1. The highest seed yields (198 and 188 kg/ha) were recorded respectiely in the least intra-row plant spacing and the application of 100 kg Piha. Supplementation of calves on grasses/cereal stovers with phasey bean hay in a sustainable crop livestock production systems is suggested.


Sign in / Sign up

Export Citation Format

Share Document