Trends in irrigated-rice yields under intensive cropping at Philippine research stations

Abstract The Global Yield Gap Atlas (GYGA) is an international project that addresses global food production capacity in the form of yield gaps (Yg). The GYGA project is unique in employing its original Climate Zonation Scheme (CZS) composed of three indexed factors, i.e. Growing Degree Days (GDD) related to temperature, Aridity Index (AI) related to available water and Temperature Seasonality (TS) related to annual temperature range, creating 300 Climate Zones (CZs) theoretically across the globe. In the present study, the GYGA CZs were identified for Japan on a municipality basis and analysis of variance (ANOVA) was performed on irrigated rice yield data sets, equating to actual yields (Ya) in the GYGA context, from long-term government statistics. The ANOVA was conducted for the data sets over two decades between 1994 and 2016 by assigning the GDD score of 6 levels and the TS score of 2 levels as fixed factors. Significant interactions with respect to Ya were observed between GDD score and TS score for 13 years out of 21 years implying the existence of favourable combinations of the GDD score and the TS score for rice cultivation. The implication was also supported by the observation with Yg. The lower values of coefficient of variance obtained from the CZs characterized by medium GDD scores indicated the stability over time of rice yields in these areas. These findings suggest a possibility that the GYGA-CZS can be recognized as a tool suitable to identify favourable CZs for growing crops.

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Effects of nitrogen mineralization on paddy rice yield under low nitrogen input conditions in irrigated rice-based multiple cropping with intensive cropping of vegetables in southwest China

Plant and Soil ◽

10.1007/s11104-008-9744-8 ◽

2008 ◽

Vol 315 (1-2) ◽

pp. 195-209 ◽

Cited By ~ 4

Author(s):

Tatsuya Inamura ◽

Yoshimi Mukai ◽

Akiko Maruyama ◽

Sachiko Ikenaga ◽

G.uili Li ◽

...

Keyword(s):

Nitrogen Mineralization ◽

Southwest China ◽

Rice Yield ◽

Paddy Rice ◽

Multiple Cropping ◽

Irrigated Rice ◽

Nitrogen Input ◽

Intensive Cropping ◽

Low Nitrogen

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Contributions of lateral flow and groundwater to the spatio-temporal variation of irrigated rice yields and water productivity in a West-African inland valley

Agricultural Water Management ◽

10.1016/j.agwat.2015.01.014 ◽

2015 ◽

Vol 152 ◽

pp. 286-298 ◽

Cited By ~ 14

Author(s):

Petra Schmitter ◽

Sander J. Zwart ◽

Alexandre Danvi ◽

Félix Gbaguidi

Keyword(s):

Temporal Variation ◽

Water Productivity ◽

West African ◽

Lateral Flow ◽

Irrigated Rice ◽

Inland Valley ◽

Rice Yields ◽

Spatio Temporal

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Soil Fertility Levels in Bangladesh for Rice Cultivation

Asian Journal of Soil Science and Plant Nutrition ◽

10.9734/ajsspn/2019/v4i430051 ◽

2019 ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

Jatish C. Biswas ◽

N. Kalra ◽

M. Maniruzzaman ◽

M. M. Haque ◽

U. A. Naher ◽

...

Keyword(s):

Soil Fertility ◽

Evaluation Method ◽

Dry Season ◽

Rice Soil ◽

Data Set ◽

Irrigated Rice ◽

Rice Yields ◽

Zn Status ◽

Crop Zoning

Determination of soil fertility with minimum data set for crop zoning and devising fertilizer recommendations as well as soil fertility evaluation method based on soil properties. The data were collected from existing literatures and scoring was done on 0–100 scale. The lowest score was assigned for the minimum value of tested attributes and then gradually higher scoring values. Arithmetic, weighted, geometric and most minimum of mean scores were calculated and their performances were compared with grain yield of dry season irrigated (Boro) rice. Soil fertility in 10-12 and 39-52% areas in Bangladesh are very low and low, respectively. Medium fertile and fertile soils are distributed in 17-41% and in about 8% areas of the country. About 55% soils scored 70–95 (medium to high SOC) and the rest belongs to inferior quality. In some areas P build up has taken place (25% areas), but widespread K mining. Sulphur and Zn status in about 40% areas are low to very low (scored <35 and <40). Soils of the major areas of the country are with low pH (5.0-6.0) and CEC in the range of 15-25 cmolc kg-1. Weighted mean score and most minimum of eight attributes score showed good relationships with dry season irrigated rice yields than other tested methods indicating that this technique can be used for soil fertility rating in tropical countries.

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Pengaruh Konversi Lahan terhadap Strategi Pemanfaatan Modal Nafkah Rumah Tangga Buruh Tani

Jurnal Sains Komunikasi dan Pengembangan Masyarakat [JSKPM] ◽

10.29244/jskpm.4.3.407-420 ◽

2020 ◽

Vol 4 (3) ◽

pp. 407

Author(s):

Hesti Prastiwi ◽

Martua Sihaloho

Keyword(s):

Qualitative Data ◽

Rice Fields ◽

Livelihood Strategies ◽

Quantitative Approach ◽

Survey Method ◽

Land Conversion ◽

Literature Study ◽

Irrigated Rice ◽

Sustainable Food ◽

The Impact

Lahan merupakan salah satu sumber daya agraria yang sangat penting bagi petani dikarenakan lahan merupakan salah satu sumber untuk bertahan hidup. Sesuai dengan Undang-Undang Dasar Nomor 41 Tahun 2009 tentang Perlindungan Lahan Pertanian Pangan Berkelanjutan. Pembangunan yang terjadi di Indonesia semakin masif, menimbulkan konversi lahan bersifat permanen ketika lahan sawah beririgasi berubah menjadi kawasan pemukiman atau industri. Konversi lahan yang terjadi menyebabkan hilangnya beberapa atau seluruh modal nafkah yang ada. Perubahan modal nafkah ini akan mengakibatkan perubahan strategi nafkah petani. Penelitian ini bertujuan untuk menganalisis dampak konversi lahan terhadap strategi nafkah dan pengaruh pemanfaatan modal nafkah terhadap strategi nafkah rumah tangga. Lokasi penelitian ini yaitu Desa Pasirgaok, Kecamatan Rancabungur, Kabupaten Bogor. Metode yang digunakan untuk menggali fakta, data, dan informasi dalam penelitian adalah pendekatan kuantitatif melalui metode survei dengan kuesioner yang didukung oleh data kualitatif melalui wawancara dan studi literatur hingga diperoleh hasil bahwa dampak konversi lahan mempengaruhi modal dan strategi nafkah.Kata Kunci: buruh tani, konversi lahan, modal nafkah, strategi nafkah=====ABSTRACTLand is one of the most important agrarian resources for farmers because land is one source of livelihood survival. According to Constitution Number 41 Year 2009 on concerning The Protection of Sustainable Food Agriculture. The development that is taking place in Indonesia is increasingly massive leading to permanent land conversion when technical irrigated rice fields change into residential or industrial areas. The land conversion that occurs causes a loss of some or all existing livelihood asset. This change in livelihood asset will result in a change in farmers livelihood strategies. This study aims to analyze the influence of the impact of land conversion towards livelihood strategies and the influence of the utilization of livelihood asset towards the livelihood strategies households. The location of this research is Pasirgaok Village, Rancabungur District, Bogor Regency. The method used to extract facts, data, and information in the research is the quantitative approach through survey method with questionnaires supported by qualitative data through interview and literature study until it is obtained that the impact of land conversion towards landless farmer household’s assets and livelihood strategies.Keywords: land conversion, landless farmer, livelihood asset, livelihood strategies

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Farmers’ Climate Change Adaptation Strategies for Reducing the Risk of Rice Production: Evidence from Rajshahi District in Bangladesh

Agronomy ◽

10.3390/agronomy11030600 ◽

2021 ◽

Vol 11 (3) ◽

pp. 600

Author(s):

Shahjahan Ali ◽

Bikash Chandra Ghosh ◽

Ataul Gani Osmani ◽

Elias Hossain ◽

Csaba Fogarassy

Keyword(s):

Climate Change ◽

Climate Change Adaptation ◽

Rice Production ◽

Adaptation Strategies ◽

Production Risk ◽

Substantial Impact ◽

Rice Farmers ◽

Agronomic Practices ◽

Rice Yields ◽

Climate Change Adaptation Strategies

A lack of adaptive capacities for climate change prevents poor farmers from diversifying agricultural production in Bangladesh’s drought-resilient areas. Climate change adaptation strategies can reduce the production risk relating to unforeseen climatic shocks and increase farmers’ food, income, and livelihood security. This paper investigates rice farmers’ adaptive capacities to adapt climate change strategies to reduce the rice production risk. The study collected 400 farm-level micro-data of rice farmers with the direct cooperation of Rajshahi District. The survey was conducted during periods between June and July of 2020. Rice farmers’ adaptive capacities were estimated quantitatively by categorizing the farmers as high, moderate, and low level adapters to climate change adaptation strategies. In this study, a Cobb–Douglas production function was used to measure the effects of farmers’ adaptive capacities on rice production. The obtained results show that farmers are moderately adaptive in terms of adaptation strategies on climate change and the degree of adaptation capacities. Agronomic practices such as the quantity of fertilizer used, the amount of labor, the farm’s size, and extension contacts have a substantial impact on rice production. This study recommends that a farmer more significantly adjusts to adaptation strategies on climate change to reduce rice production. These strategies will help farmers to reduce the risk and produce higher quality rice. Consequently, rice farmers should facilitate better extension services and change the present agronomic practice to attain a higher adaptation status. It can be very clearly seen that low adaptability results in lower rice yields.

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